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Lactose, or milk sugar, is a disaccharide composed of galactose and glucose and has the molecular formula C 12 H 22 O 11.Lactose makes up around 2–8% of milk (by mass). The name comes from lact (gen. lactis), the Latin word for milk, plus the suffix -ose used to name sugars.
Although this chemical process had not been properly described before Pasteur's work, microbial lactic acid fermentation had been used in food production much earlier. Chemical analysis of archaeological finds show that milk fermentation had been used since prehistory; its first applications were probably a part of the Neolithic Revolution.
The lactose gives milk its sweet taste and contributes approximately 40% of the calories in whole cow's milk's. Lactose is a disaccharide composite of two simple sugars, glucose and galactose. Bovine milk averages 4.8% anhydrous lactose, which amounts to about 50% of the total solids of skimmed milk.
For example, milk sugar (lactose) is a disaccharide made by condensation of one molecule of each of the monosaccharides glucose and galactose, whereas the disaccharide sucrose in sugar cane and sugar beet, is a condensation product of glucose and fructose. Maltose, another common disaccharide, is condensed from two glucose molecules. [7]
During the second phase, chemical energy from the intermediates is transferred into ATP and NADH. [2] The breakdown of one molecule of glucose results in two molecules of pyruvate, which can be further oxidized to access more energy in later processes. [1] Glycolysis can be regulated at different steps of the process through feedback regulation.
Sugar cane accounted for around 21% of the global crop production over the 2000–2021 period. The Americas was the leading region in the production of sugar cane (52% of the world total). [86] Global production of sugarcane in 2020 was 1.9 billion tonnes, with Brazil producing 40% of the world total and India 20% (table).
When L. lactis ssp. lactis is added to milk, the bacterium uses enzymes to produce energy molecules , from lactose. The byproduct of ATP energy production is lactic acid. The lactic acid produced by the bacterium curdles the milk, which then separates to form curds that are used to produce cheese. [11]
Current research is finding new application of α-lactalbumin outside the physiological lactose production. Nutrition: α-Lactalbumin is essential for newborn nutrition. This protein provides essential amino acids and bioactive compounds necessary for optimal growth, development, and health. α-Lactalbumin is the most abundant whey protein in ...